Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 3: Commands |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "InternalRoutines.h" |
| 9 | #include "ClockSet_fp.h" |
| 10 | // |
| 11 | // Read the current TPMS_TIMER_INFO structure settings |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_VALUE invalid new clock |
| 16 | // |
| 17 | TPM_RC |
| 18 | TPM2_ClockSet( |
| 19 | ClockSet_In *in // IN: input parameter list |
| 20 | ) |
| 21 | { |
| 22 | #define CLOCK_UPDATE_MASK ((1ULL << NV_CLOCK_UPDATE_INTERVAL)- 1) |
| 23 | UINT64 clockNow; |
| 24 | |
| 25 | // Input Validation |
| 26 | |
| 27 | // new time can not be bigger than 0xFFFF000000000000 or smaller than |
| 28 | // current clock |
| 29 | if(in->newTime > 0xFFFF000000000000ULL |
| 30 | || in->newTime < go.clock) |
| 31 | return TPM_RC_VALUE + RC_ClockSet_newTime; |
| 32 | |
| 33 | // Internal Data Update |
| 34 | |
| 35 | // Internal Data Update |
| 36 | clockNow = go.clock; // grab the old value |
| 37 | go.clock = in->newTime; // set the new value |
| 38 | // Check to see if the update has caused a need for an nvClock update |
| 39 | if((in->newTime & CLOCK_UPDATE_MASK) > (clockNow & CLOCK_UPDATE_MASK)) |
| 40 | { |
| 41 | CryptDrbgGetPutState(GET_STATE); |
| 42 | NvWriteReserved(NV_ORDERLY_DATA, &go); |
| 43 | |
| 44 | // Now the time state is safe |
| 45 | go.clockSafe = YES; |
| 46 | } |
| 47 | |
| 48 | return TPM_RC_SUCCESS; |
| 49 | } |